Fabrication of Co0.5Ni0.5CrxFe2-xO4 materials via sol-gel method and their characterizations

被引:57
|
作者
Kadam, R. H. [2 ]
Birajdar, A. P. [2 ]
Alone, Suresh T. [3 ]
Shirsath, Sagar E. [1 ]
机构
[1] Shinshu Univ, Dept Informat Engn, Spin Device Technol Ctr, Nagano 3808553, Japan
[2] Srikrishna Mahavidyalaya Gunjoti, Mat Res Lab, Osmanabad 413613, Maharashtra, India
[3] RS Arts Sci & Commerce Coll, Dept Phys, Aurangabad, Maharashtra, India
关键词
Ferrite nanoparticle; Cation distribution; Magnetization; CO-NI ALLOYS; MAGNETIC-PROPERTIES; ELECTRODEPOSITION; MICROSTRUCTURE; PARTICLES;
D O I
10.1016/j.jmmm.2012.09.059
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Co0.5Ni0.5CrxFe2-xO4 nanoparticles have been designed by the sol-gel auto combustion method, using nitrates of the respective metal ions, and citric acid as the starting materials. The process takes only a few minutes to obtain as-received Cr-substituted Co-Ni ferrite powders. X-ray diffraction (XRD), vibrational sample magnetometer (VSM), transmission electron microscopy (TEM) are utilized in order to study the effect of variation in the Cr3+ substitution and its impact on particle size, lattice constant, specific surface area, cation distribution and magnetic properties. Lattice parameter, particle size found to decrease with increasing Cr3+ content, whereas specific surface area showed increasing trend with the Cr3+ substitution. Cation distribution indicates that the Cr, Co and Ni ions show preference toward octahedral [B] site, whereas Fe occupies both tetrahedral (A) and octahedral [B] sites. Saturation magnetization (M-S) decreased from 65.1 to 40.6 emu/g with the increase in Cr3+ substitution. However, Coercivity increased from 198 to 365 Oe with the Cr3+ substitution. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:167 / 171
页数:5
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